Step for a bus



FIG. 1 is an isometric view of a step for a bus;

FIG. 2 is a front view of the step of FIG. 1;

FIG. 3 is a side view of the step of FIG. 1;

FIG. 4 is rear view of the step of FIG. 1; and,

FIG. 5 is a top view of the step of FIG. 1.

Views not shown in the Figures are either not part of the claimed design or are mirror images of those shown.

Broken lines are for illustrative purposes only and form no part of the design. 

I claim the ornamental design for a step for a bus, as shown and described. 